test: add supertest plugin management method

lib/supertest/api.ex

@@ -127,6 +127,19 @@ defmodule Supertest.API do
 
   def received_cluster_pubsub(_params), do: {:error, :invalid_run_id}
 
+  def management_echo(context, params) do
+    {:ok,
+     %{
+       ok: true,
+       plugin: context.plugin,
+       method: context.method,
+       version: context.version,
+       admin: context.admin?,
+       actor_pubkey: context.actor_pubkey,
+       params: params
+     }}
+  end
+
   defp destroy_all(entries, fun) do
     Enum.reduce_while(entries, :ok, fn entry, :ok ->
       case fun.(entry) do

lib/tribes/plugins/supertest/plugin.ex

@@ -28,6 +28,16 @@ defmodule Tribes.Plugins.Supertest.Plugin do
       api_routes: [
         {"/", SupertestWeb.APIPlug}
       ],
+      management_methods: [
+        %{
+          name: "supertest.echo",
+          version: "1",
+          module: Supertest.API,
+          action: :management_echo,
+          auth: :admin,
+          description: "Echo plugin management context"
+        }
+      ],
       children: cluster_pubsub_children(context)
     })
   end

test/supertest/api_test.exs

@@ -109,6 +109,29 @@ defmodule Supertest.APITest do
              Supertest.API.received_cluster_pubsub(%{"run_id" => run_id})
   end
 
+  test "echoes plugin management context" do
+    context = %Tribes.Plugin.ManagementContext{
+      plugin: "supertest",
+      method: "supertest.echo",
+      version: "1",
+      actor_pubkey: String.duplicate("a", 64),
+      admin?: true
+    }
+
+    assert {:ok,
+            %{
+              ok: true,
+              plugin: "supertest",
+              method: "supertest.echo",
+              version: "1",
+              admin: true,
+              actor_pubkey: actor_pubkey,
+              params: %{"probe" => true}
+            }} = Supertest.API.management_echo(context, %{"probe" => true})
+
+    assert actor_pubkey == String.duplicate("a", 64)
+  end
+
   defp eventually(assertion, attempts \\ 20)
 
   defp eventually(assertion, attempts) when attempts > 0 do